Coffee machine



FIG. 1 is a perspective from in front and above to the left of theinvention;

FIG. 2 is a front elevational view of the invention;

FIG. 3 is a right-side elevational view of the invention;

FIG. 4 is a left-side elevational view of the invention;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a top plan view thereof.

The broken lines in the drawings are included for the purpose ofillustration and form no part of the claimed design.

The ornamental design for a coffee machine, as shown and described.